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Cuenca AG, Joiner DN, Gentile LF, Cuenca AL, Wynn JL, Kelly-Scumpia KM, Scumpia PO, Behrns KE, Efron PA, Nacionales D, Lui C, Wallet SM, Reeves WH, Mathews CE, Moldawer LL. TRIF-dependent innate immune activation is critical for survival to neonatal gram-negative sepsis. J Immunol 2015; 194:1169-77. [PMID: 25548220 PMCID: PMC4297742 DOI: 10.4049/jimmunol.1302676] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Current evidence suggests that neonatal immunity is functionally distinct from adults. Although TLR signaling through the adaptor protein, MyD88, has been shown to be critical for survival to sepsis in adults, little is known about the role of MyD88 or TRIF in neonatal sepsis. We demonstrate that TRIF(-/-) but not MyD88(-/-) neonates are highly susceptible to Escherichia coli peritonitis and bacteremia. This was associated with decreased innate immune recruitment and function. Importantly, we found that the reverse was true in adults that MyD88(-/-) but not TRIF(-/-) or wild-type adults are susceptible to E. coli peritonitis and bacteremia. In addition, we demonstrate that TRIF but not MyD88 signaling is critical for the TLR4 protective adjuvant effect we have previously demonstrated. These data suggest a differential requirement for the survival of neonates versus adults to Gram-negative infection, and that modulation of TRIF in neonates can be used to augment survival to neonatal sepsis.
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Affiliation(s)
- Alex G Cuenca
- Department of Surgery, University of Florida College of Medicine and Dentistry, Gainesville, FL 32610
| | - Dallas N Joiner
- Department of Surgery, University of Florida College of Medicine and Dentistry, Gainesville, FL 32610
| | - Lori F Gentile
- Department of Surgery, University of Florida College of Medicine and Dentistry, Gainesville, FL 32610
| | - Angela L Cuenca
- Department of Surgery, University of Florida College of Medicine and Dentistry, Gainesville, FL 32610
| | - James L Wynn
- Division of Neonatology, Department of Pediatrics Vanderbilt University, Nashville, TN 37232
| | - Kindra M Kelly-Scumpia
- Department of Surgery, University of Florida College of Medicine and Dentistry, Gainesville, FL 32610
| | - Philip O Scumpia
- Department of Surgery, University of Florida College of Medicine and Dentistry, Gainesville, FL 32610
| | - Kevin E Behrns
- Department of Surgery, University of Florida College of Medicine and Dentistry, Gainesville, FL 32610
| | - Philip A Efron
- Department of Surgery, University of Florida College of Medicine and Dentistry, Gainesville, FL 32610
| | - Dina Nacionales
- Department of Surgery, University of Florida College of Medicine and Dentistry, Gainesville, FL 32610
| | - Chao Lui
- Department of Pathology, University of Florida College of Medicine and Dentistry, Gainesville, FL 32610
| | - Shannon M Wallet
- University of Florida College of Medicine and Dentistry, Gainesville, FL 32610; and
| | - Westley H Reeves
- Department of Medicine, University of Florida College of Medicine and Dentistry, Gainesville, FL 32610
| | - Clayton E Mathews
- Department of Pathology, University of Florida College of Medicine and Dentistry, Gainesville, FL 32610
| | - Lyle L Moldawer
- Department of Surgery, University of Florida College of Medicine and Dentistry, Gainesville, FL 32610;
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Cuenca AG, Cuenca AL, Winfield RD, Joiner DN, Gentile L, Delano MJ, Kelly-Scumpia KM, Scumpia PO, Matheny MK, Scarpace PJ, Vila L, Efron PA, LaFace DM, Moldawer LL. Novel role for tumor-induced expansion of myeloid-derived cells in cancer cachexia. J Immunol 2014; 192:6111-9. [PMID: 24829407 DOI: 10.4049/jimmunol.1302895] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Cancer progression is associated with inflammation, increased metabolic demand, infection, cachexia, and eventually death. Myeloid-derived suppressor cells (MDSCs) commonly expand during cancer and are associated with adaptive immune suppression and inflammatory metabolite production. We propose that cancer-induced cachexia is driven at least in part by the expansion of MDSCs. MDSC expansion in 4T1 mammary carcinoma-bearing hosts is associated with induction of a hepatic acute-phase protein response and altered host energy and fat metabolism, and eventually reduced survival to polymicrobial sepsis and endotoxemia. Similar results are also seen in mice bearing a Lewis lung carcinoma and a C26 colon adenocarcinoma. However, a similar cachexia response is not seen with equivalent growth of the 66C4 subclone of 4T1, in which MDSC expansion does not occur. Importantly, reducing MDSC numbers in 4T1-bearing animals can ameliorate some of these late responses and reduce susceptibility to inflammation-induced organ injury and death. In addition, administering MDSCs from both tumor- and nontumor-bearing mice can produce an acute-phase response. Thus, we propose a previously undescribed mechanism for the development of cancer cachexia, whereby progressive MDSC expansion contributes to changes in host protein and energy metabolism and reduced resistance to infection.
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Affiliation(s)
- Alex G Cuenca
- Department of Surgery, University of Florida College of Medicine, Gainesville, FL 32610
| | - Angela L Cuenca
- Department of Surgery, University of Florida College of Medicine, Gainesville, FL 32610
| | - Robert D Winfield
- Department of Surgery, University of Florida College of Medicine, Gainesville, FL 32610
| | - Dallas N Joiner
- Department of Surgery, University of Florida College of Medicine, Gainesville, FL 32610
| | - Lori Gentile
- Department of Surgery, University of Florida College of Medicine, Gainesville, FL 32610
| | - Matthew J Delano
- Department of Surgery, University of Florida College of Medicine, Gainesville, FL 32610
| | | | - Philip O Scumpia
- Department of Surgery, University of Florida College of Medicine, Gainesville, FL 32610
| | - Michael K Matheny
- Department of Pharmacology and Therapeutics, University of Florida College of Medicine, Gainesville, FL 32610
| | - Philip J Scarpace
- Department of Pharmacology and Therapeutics, University of Florida College of Medicine, Gainesville, FL 32610
| | - Lizette Vila
- Department of Pathology, Immunology and Laboratory Medicine, University of Florida College of Medicine, Gainesville, FL 32610; and
| | - Philip A Efron
- Department of Surgery, University of Florida College of Medicine, Gainesville, FL 32610
| | - Drake M LaFace
- Merck Research Laboratories (formerly DNAX Research Institute), Palo Alto, CA 94304
| | - Lyle L Moldawer
- Department of Surgery, University of Florida College of Medicine, Gainesville, FL 32610;
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